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Author Topic: Making SEGA Genesis cartridges  (Read 35881 times)

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pbj

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Re: Making SEGA Genesis cartridges
« Reply #80 on: June 20, 2022, 12:36:09 am »
So far, I haven’t had to tie up Isaac and take him to the mountaintop but it occasionally feels like it.

Made another batch today.  Sonic Complete I’m particularly proud of - a 4MB rom split across two 2MB chips and soldered onto a World Series Baseball 95 pcb.  New battery and filter capacitor, it should last awhile.  A couple other games slapped onto a common genesis SRAM pcb.  The others are on repro boards in worthless sport game shells.  When I’m in Hell with Joe Montana I hope he’s like, “why did you kill so many of my cartridges?”  And I’ll be all like, “I’ll never forgive you for that NFC Championship and 74 cents each, bro.”

Cave Story and Starflight continue to vex me.  My slave driver also wants Barkley 2 on an Accolade pcb and they’re just as bad as EA.

Anyway, the madness continues….


bobbyb13

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Re: Making SEGA Genesis cartridges
« Reply #81 on: June 20, 2022, 03:16:22 am »
80 posts and this monument of build your own has already spun out of control on you.
 :cheers:

Love it.
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Re: Making SEGA Genesis cartridges
« Reply #82 on: June 20, 2022, 07:25:05 am »
My slave driver also wants Barkley 2 on an Accolade pcb and they’re just as bad as EA.

*wha-pshhhhhh*

You can put Barkely 2 in an EA case if its too much of a pain in the bootay.  Wonder if anyone noticed I flipped the hero on the Shining Force 2 label? I am down right GIDDY for Grind Stormer
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Re: Making SEGA Genesis cartridges
« Reply #83 on: June 20, 2022, 10:45:41 am »
A few more this morning....

 :cheers:


pbj

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Re: Making SEGA Genesis cartridges
« Reply #84 on: June 21, 2022, 10:58:59 am »
Anyway, it's time to reclaim the gameroom and decommission the Genesis factory for awhile.  I've got ~30 more repro boards prepped with capacitors and 50 more EPROMs on the way from China.  A large box stuffed full of games is en route to its new home.

But we had to go out with one final bang, of course.  After I swore I'd never touch an EA board again, Malenko had a specific request for Barkley Shut Up & Jam 2 in an Accolade cartridge.  Oddly, the two Barkley games shipped in both Sega and Accolade shells.

So, I cracked open a copy of Hardball 95, a saving Accolade PCB from the same time period as Barkley.  The chip was very resistant to being pulled, I had to break it into pieces and pull it off forcefully.  Then came the nightmare of trying to clean the holes out.  Shop vac desoldering rig on both settings (suck AND blow!) helped some, but not much.  Heating each hole with the iron and then blowing on them as hard as I could helped some, but not much.  Nothing like a hot soldering iron two inches from your face.  Flux and copper braid helped some, but not much.  Then traces stared vaporizing and that was that.  3 hours of my life - gone.  I cannot figure these EA and Accolade boards out. 

Well, then I get a stupid idea... can a Sega board be crammed into an Accolade case?  And the answer is YES!  It will just barely fit over the mounting posts in the shell.  The fingerboard juts out a little too far, and you have to notch out some of the plastic (unseen) so that the filter capacitor legs are clear.  Other option would be to mount the capacitor elsewhere on the PCB, but eh.

To my knowledge, there's only one Barkley 2 ROM out there, and since we know it shipped on both types of PCBs, I put the chip on a 171-6278A board.  This seems to be the most widely used 2MB eprom saving PCB.  I've got dozens of them loose in a box now.



And damned if it didn't work.  My team "GAMESUX" and their losing record was successfully saving.

Other semi-interesting thing about this is that an Accolade label is very close in size to an EA label with the title spine clipped off.  So that's how we designed the label.  Close enough.

I present my Frankenstein abomination game:



 :cheers:
« Last Edit: June 21, 2022, 05:45:17 pm by pbj »

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Re: Making SEGA Genesis cartridges
« Reply #85 on: June 21, 2022, 07:59:10 pm »
I present my Frankenstein abomination game:
Actually that's *MY* abomination, and I will cherish it forever.


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Re: Making SEGA Genesis cartridges
« Reply #86 on: June 22, 2022, 02:46:41 am »
I present my Frankenstein abomination game:
Actually that's *MY* abomination, and I will cherish it forever.

I've now lost track of who is Dr. F and who is Igor...

-Blucher!
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Re: Making SEGA Genesis cartridges
« Reply #87 on: June 24, 2022, 06:20:49 pm »
I'm Venom, he's Eddy? I dunno.


All I do know is my mailman delivered a box to my porch from about 6 feet away, but everything seems to have survived.  Ive already mixed the boots in with the legits, cause I dont give a ---fudgesicle---.


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Re: Making SEGA Genesis cartridges
« Reply #88 on: June 24, 2022, 10:48:26 pm »
So, I kinda hate to give this secret away but Napa Valley cassette crates hold 12 genesis games perfectly, as shown in his picture.  In bulk, you can nab them for $5-6 shipped.  I bought a crate of 14.  And 8.  And 5.   :-\

I also gambled on a weird eBay lot and came out okay.  Not great, but okay.  53 games for ~87 cents each.  I’ve got 50 more EPROMs coming from China.  I’ll probably another batch of repro pcbs in the works.  Malenko and I have nice templates for making regular game labels fit onto EA cases.

 :cheers:

« Last Edit: June 24, 2022, 10:50:01 pm by pbj »

Malenko

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Re: Making SEGA Genesis cartridges
« Reply #89 on: July 05, 2022, 10:30:33 am »
My genny collection is super happy on its new shelf.


and I moved the genny from the CRT TV over to the 2nd cubby slot (PS2 got booted)


I didnt have the foresight to put Barkley 2 up on the TV.
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Re: Making SEGA Genesis cartridges
« Reply #90 on: July 05, 2022, 11:27:27 am »
Great looking space.

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Re: Making SEGA Genesis cartridges
« Reply #91 on: July 05, 2022, 01:16:47 pm »
Just trying to make the unfinished space usable till I end up finishing it too. Last place I finished the basement and we sold the house 3 weeks later.
linkie: http://forum.arcadecontrols.com/index.php/topic,160077.msg1684316.html

Right now I'm in the middle of a master bath / closet renovation then I think my wife wants the Laundry moved to the second floor, it never ends.


back to the subject at hand:


When you slightly mess up the labels, they look more real and less bootleggy :)
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Re: Making SEGA Genesis cartridges
« Reply #92 on: July 05, 2022, 01:41:03 pm »
I run a sharpie sideways around the edges of the labels after I cut them out.  Hides that white leading edge.  Nobody will ever notice or care, but deep down, we'll know.


pbj

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Re: Making SEGA Genesis cartridges
« Reply #93 on: July 13, 2022, 09:52:16 pm »
I’ve been making a few here and there, but mostly I’ve been waiting on my latest batch of EPROMs to arrive.  This takes me up to 175 EPROMs purchased.  Of the 25 4MB EPROMs, all have flashed so far.  Of the first batch of 50 2MB EPROMs, 37 flashed.  Of the second batch of 50, 50 flashed.  So who knows with this latest pile..



With all this newfound SEGA knowledge, I’ve been watching this ridiculous auction on eBay for two loose pcbs get posted over and over for a couple of months.  Based on the MPR number, I was 99% sure they were Altered Beast and Thunderforce 3.  I wanted an Altered Beast and TF3 is “worth money.”  However, Thunderforce seemed to be a variant I couldn’t find online, but the five digits matched up to known copies.  Suffix is supposed to designate brand of ROM or something.

Anyway, here’s a common TF3:



And here’s what I bought after a lowball offer, Altered Beast up top:



So it’s been a long three days but the moment of truth arrived:



These have been moved to shells and given new covers:






Zebidee

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Re: Making SEGA Genesis cartridges
« Reply #94 on: July 13, 2022, 10:37:19 pm »
Wow, nice!

Loving this original artwork

Check out my completed projects!


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Re: Making SEGA Genesis cartridges
« Reply #95 on: July 14, 2022, 04:38:49 pm »
you could use this?

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Re: Making SEGA Genesis cartridges
« Reply #96 on: July 14, 2022, 10:16:52 pm »
The post it note had some kind of jenny say kwah about it but I couldn’t do them wrong like that.




 :cheers:
« Last Edit: July 15, 2022, 10:02:13 am by pbj »

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Re: Making SEGA Genesis cartridges
« Reply #97 on: July 15, 2022, 09:17:51 am »
jenny say kwah

I laughed way too hard at that. je ne sais quoi

That Cotton label looks amazing. You must know a really talented artist.
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Re: Making SEGA Genesis cartridges
« Reply #98 on: July 17, 2022, 12:09:02 am »
Made 9 more today.  Bad Omen / Devilish is actually very good.


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Re: Making SEGA Genesis cartridges
« Reply #99 on: July 17, 2022, 02:21:44 am »
STILL my favorite thread-

Is there a count for how many Sega Gensis cartidge titles there actually were BITD?

And then of course how many of those are pbj approved of course.
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Re: Making SEGA Genesis cartridges
« Reply #100 on: July 17, 2022, 03:29:31 am »
This may not be possible... but an interesting idea, would be to make Sega Master system carts,
inside of a Genesis cart.. where the converter is built into the cart.

 That way, you could play SMS games, without the need to pop in the converter.

 I think the Power Base Converter, is just a different wiring pinout.

 The most challenging cart, would be a way to incorporate the 3D glasses adapter.

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Re: Making SEGA Genesis cartridges
« Reply #101 on: July 17, 2022, 07:19:05 pm »
It’s possible but SEGA Master used mapper chips and such that Genesis didn't.  I spent a lot of time researching it. You can get a universal sms cart for $20, and a converter for $20.  Or get a clone genesis everdrive for $20 that runs the roms. 

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Re: Making SEGA Genesis cartridges
« Reply #102 on: July 23, 2022, 11:51:47 pm »
Have spit out a few more in the past few days.  More games that didn’t originally come in EA cases.  I’m actually getting very low on repro boards and SEGA shells.  I need to make some decisions about how much further I’m taking this.

Anyway, latest batch of EPROMs came pretty smashed.  Now I’m scrapping away parts of the chips and soldering wires to tiny metal nubs to recreate broken chip legs.  Even more hackery.



That Crusader of Centy cart is actually running a SEGA pcb.  The rom chips desolder very cleanly on them.  So it’s some random sports pcb that’s been converted.  New battery and filter cap, it will outlive Malenko.

Dick Tracy is actually very good and violent as hell.  I haven’t gotten very far but it’s interesting.  I always thought the screenshots looked awesome but I never played it back in the day.

Captain America is a decent port.  It has a color palette hack.

Oddly, despite the “going ape spit” cover art, Toki appears to just be Toki.



Marvel Land is another one I never actually played until I made one.  Haven’t gotten far but appears to be a good Super Mario rip off.

El Viento is running some improvement hack.  It’s another oddly good but weird game.

 :cheers:

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Re: Making SEGA Genesis cartridges
« Reply #103 on: July 25, 2022, 11:33:44 am »
Centy looks amazing. I hated that all the bootleg covers had the sword vertical instead of horizontal, so I like mine better.

Your Captain American label looks great, looks legit as heck.
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Re: Making SEGA Genesis cartridges
« Reply #104 on: July 25, 2022, 05:38:42 pm »
WOW,

Haven't been on BYOAC lately, This is amazing!!!

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Re: Making SEGA Genesis cartridges
« Reply #105 on: July 27, 2022, 01:28:26 pm »
Thanks, Locke.  The only thing better than reading this thread is getting your hands on some beautiful Genesis reproduction cartridges.   :lol

I'm currently causing another price bubble on the auction sites.  I need more Sega shells.  Alternative is to buy reproductions from China but that feels like throwing in the towel.

 :cheers:

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Re: Making SEGA Genesis cartridges
« Reply #106 on: August 08, 2022, 12:26:11 am »
So, a little more action this weekend.  First I split my games into SEGA vs EA shells and alphabetized each stack.  I’m at around 150 games now.



A loved one has burned through a couple of clone Genesis consoles and I threw in the towel and bought him a “dead” one for $30 shipped with two controllers and three games.

The problem was quickly identified:



Two screws were missing from the case so the motherboard was shifting around whenever you plugged in the power supply.  I took the entire thing apart, scrubbed and soaked and cleaned.  Reflowed that bad power supply connector solder joint and replaced the missing screws.  I also rubbed the case down with a layer of wax.




Next I was going through my games to give him a few I thought he would like.  One of them was Tengen Ms Pac-Man that was oddly on a SEGA pcb.  Wouldn’t boot.  Reflowed everything, changed capacitors, cleaned edge connector, still nothing.  So I found a YouTube video where he says that ROMs on Genesis blow internal gates if the carts are removed with the power on.  The way to test this is to put your multimeter on diode check, put the positive lead on ground, and then check each pin on the ROM.  You should get a consistent value on each non ground pin.  For me it was 0.62V.  Except for one pin.  It wasn’t reading at all.  The fix is to put a 1k ohm resistor from that pin to ground.




And it freaking worked!



Here’s the video:



https://www.youtube.com/watch?v=eCT4ZKV20RI


« Last Edit: August 08, 2022, 12:34:56 am by pbj »

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Re: Making SEGA Genesis cartridges
« Reply #107 on: August 08, 2022, 05:14:21 am »
Beautiful rehab work on that console.
And in spite of my general feelings about the interwebs sometimes, the Ms. Pac repair proves that the internet is worth something.

Sweet.
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Re: Making SEGA Genesis cartridges
« Reply #108 on: August 23, 2022, 02:58:44 pm »
I, uh, bought 54 more games just for the shells.  Thankfully they're actual SEGA shells this time around, so I can quit messing around with EA and those universal PCBs.

Would be really, really swell if someone else had a Genesis around here.

 :banghead:


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Re: Making SEGA Genesis cartridges
« Reply #109 on: August 24, 2022, 02:15:18 am »
I feel like I should buy one just so I can justify buying some repro cartidges and fueling this glorious mayhem.

 :)
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Re: Making SEGA Genesis cartridges
« Reply #110 on: August 25, 2022, 07:33:12 am »
I, uh, bought 54 more games just for the shells.  Thankfully they're actual SEGA shells this time around, so I can quit messing around with EA and those universal PCBs.

Would be really, really swell if someone else had a Genesis around here.

 :banghead:

plus the 15 or so I sent you!
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Re: Making SEGA Genesis cartridges
« Reply #111 on: August 25, 2022, 02:53:48 pm »
... I took the entire thing apart, scrubbed and soaked and cleaned.  ...

I still need to diagnose my genesis's problems.  What did you use to clean yours?  Are you talking shell or the pcb as well?

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Re: Making SEGA Genesis cartridges
« Reply #112 on: August 25, 2022, 03:45:45 pm »
I spray down PCBs with charcoal lighter fluid.  If you squeeze the bottle hard enough, you'll wash the dirt off.  Then maybe a quick water rinse with the sink spray nozzle if I'm feeling risky and let it drip dry.  Otherwise just a drip dry.  I mean, put your cigarette out or whatever, but it's always worked for me.

Shell was tossed in a sink full of blue Dawn dish soap.  If it's good enough for baby ducks, it's good enough for your Genesis.


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Re: Making SEGA Genesis cartridges
« Reply #113 on: August 26, 2022, 10:41:49 pm »
I can quit anytime…..

I don’t need your help….



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Re: Making SEGA Genesis cartridges
« Reply #114 on: August 27, 2022, 05:48:44 am »
I can quit anytime…..

I don’t need your help….



 :lol   :o   :laugh2:

Holy ---steaming pile of meadow muffin---
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Re: Making SEGA Genesis cartridges
« Reply #115 on: August 28, 2022, 04:45:28 pm »
So, just to clarify... Because a friend of mine was confused....

Don't do this...



However, you can't argue with the results:



All you do is soak them for awhile and then peel the label.  If you do it carefully, you can dry out the label and reapply.  Which may come in handy for 2600 or Japanese Megadrive carts where the screws are under the label.


bobbyb13

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Re: Making SEGA Genesis cartridges
« Reply #116 on: August 29, 2022, 02:05:08 am »
That game sucked so bad that all of them should have been set on fire.

But with a flamethrower.
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Re: Making SEGA Genesis cartridges
« Reply #117 on: September 04, 2022, 12:50:38 am »
So, I haven’t completely forsaken Genesis for Neo Geo hotness but the passion is waning.

However, there is a recent rom hack for Road Rash 3 that actually fixes it.  That game was originally such a microwaved turd sprayed into our mouths that nobody speaks of it now.  The hack fixes the frame rate and most of the taste. 

There’s also a hack of Dynamite Headdy that restores all the Japanese story mode stuff.

Mercs  on Genesis is better than arcade version.

Decap Attack is fun.

Also turned out that the box of cheap Genesis crap sports games had a copy of Ultimate Qix in it.  Bad label but works fine.  Fun game “worth” about $20ish.

 :cheers:





Also, I’ve been keeping a graveyard of the ROMs I’ve pulled off SEGA boards.  It’s actually starting to darken my soul….



« Last Edit: September 04, 2022, 01:11:39 am by pbj »

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Re: Making SEGA Genesis cartridges
« Reply #118 on: September 05, 2022, 09:30:44 pm »
Made a few more…. Ristar is absolutely kicking ---my bottom---.  I’m going to gave to dig up photos of the original pcbs and see what’s going on.  Cannot get it to boot.

Rest of them good to go minus a label for Side Pocket.


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Re: Making SEGA Genesis cartridges
« Reply #119 on: September 06, 2022, 02:18:46 am »
Some imaginitive soul should be able to make some cool art piece with that pile of rom carcasses.
Relax, all right? My old man is a television repairman, he's got this ultimate set of tools! I can fix it.